c-- ccc ccd ccg cck cco ccu cdc cdd cdg cdk cdo cdu cgc cgd cgg cgo cgu ckc ckd cko co- coc cod cog cok coo cou cuc cud cug cuk cuo cuu dcc dcd dcg dck dco dcu ddc ddd ddg ddk ddo ddu dgc dgd dgg dgk dgu dkc dkg dkk dko dku doc dod dog dok doo dou duc dud dug duk duo g-d gcc gcd gcg gck gco gcu gdc gdd gdk gdo gdu ggc ggd ggg ggo ggu gkd gko goc god gog gok goo gou gu- guc gud gug guk guo guu kcc kcd kcg kck kcu kdc kdg kdk kdo kdu kgc kgd kgo kgu kkc kkk kku koc kod kog kok koo kou kuc kud kug kuk kuu oc- occ ocd ocg ock oco ocu odc odd odg odo odu ogc ogd ogg ogo okc okd okg okk oko oku oo- ooc ood oog ook ooo ou- ouc oud ouk ouo ucc ucd ucg uck uco ucu udc udd udg udk udo udu ugc ugg ugk ugo ugu ukc ukk uku uoc uod uog uok uoo uuc uug uuu